This paper introduces calligraphy psychology and calligraphy therapy as a research based framework for examining the health promoting and therapeutic functions of Chinese calligraphic practice. Drawing on long-term interdisciplinary work, the presentation explores how brush writing, understood as a structured psychophysiological activity, may influence attention, emotional regulation, stress reduction, and body mind coordination. The theoretical premise of this field is that Chinese calligraphy involves more than artistic expression. The practice requires sustained attention, controlled movement, visual spatial monitoring, rhythmic regulation, and continuous sensory feedback. These interacting processes make calligraphy a potentially effective medium for strengthening self regulation and supporting psychological and physiological balance. Research conducted over several decades has employed methods from psychology, physiology, cognitive science, and neuroscience to study these effects in relation to mental health, rehabilitation, and quality of life.